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British Standard O-Rings are very similar to Standard O-Rings in the fact that they are both standardized imperically. The British Standard however, incorporates some extended sizes in the 1/4" nominal cross section group for an even broader application range. British Standard O-Rings serve a variety of industries including aerospace, paint, food, and chemical transport. Viton is also known as: Fluorocarbon and FKM. Viton® is a registered trademarks of DuPont® Dow Elastomers.

A fluoroelastomer compound with a combination of exceptional mechanical properties and compression set resistance. This particular energizer gives an O-ring excellent memory and the ability to recover rapidly from deformation. This core has a Shore A hardness of 75 with a suggested operating temperature range of -10°F to +300°F (-23°C to +150°C) in encapsulated applications. For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
BS O-Rings
Unit of Measure
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Item #

IntegrationID

Type

Material

Cross Section Width

Durometer

Inside Diameter

CSW Tolerance

BS Number

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O-Ring Industries

Quantity
BS448 V-90 N/A
185719 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 9.475 in240.67 mm N/A 0.006 in0.15 mm N/A -448 N/A N/A O-rings are used in the military defense and agriculture industries.
BS447 V-90 N/A
185720 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 8.975 in227.97 mm N/A 0.006 in0.15 mm N/A -447 N/A N/A O-rings are used in the military defense and agriculture industries.
BS446 V-90 N/A
185721 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 8.475 in215.27 mm N/A 0.006 in0.15 mm N/A -446 N/A N/A O-rings are used in the military defense and agriculture industries.
BS445 V-90 N/A
185722 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 7.975 in202.57 mm N/A 0.006 in0.15 mm N/A -445 N/A N/A O-rings are used in the military defense and agriculture industries.
BS444 V-90 N/A
185723 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 7.725 in196.22 mm N/A 0.006 in0.15 mm N/A -444 N/A N/A O-rings are used in the military defense and agriculture industries.
BS443 V-90 N/A
185724 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 7.475 in189.87 mm N/A 0.006 in0.15 mm N/A -443 N/A N/A O-rings are used in the military defense and agriculture industries.
BS442 V-90 N/A
185725 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 7.225 in183.52 mm N/A 0.006 in0.15 mm N/A -442 N/A N/A O-rings are used in the military defense and agriculture industries.
BS441 V-90 N/A
185726 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 6.975 in177.17 mm N/A 0.006 in0.15 mm N/A -441 N/A N/A O-rings are used in the military defense and agriculture industries.
BS440 V-90 N/A
185727 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 6.725 in170.82 mm N/A 0.006 in0.15 mm N/A -440 N/A N/A O-rings are used in the military defense and agriculture industries.
BS439 V-90 N/A
185728 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 6.475 in164.47 mm N/A 0.006 in0.15 mm N/A -439 N/A N/A O-rings are used in the military defense and agriculture industries.v
BS438 V-90 N/A
185729 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 6.225 in158.12 mm N/A 0.006 in0.15 mm N/A -438 N/A N/A O-rings are used in the military defense and agriculture industries.
BS437 V-90 N/A
185730 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 5.975 in151.77 mm N/A 0.006 in0.15 mm N/A -437 N/A N/A O-rings are used in the military defense and agriculture industries.
BS436 V-90 N/A
185731 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 5.850 in148.59 mm N/A 0.006 in0.15 mm N/A -436 N/A N/A O-rings are used in the military defense and agriculture industries.
BS435 V-90 N/A
185732 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 5.725 in145.42 mm N/A 0.006 in0.15 mm N/A -435 N/A N/A O-rings are used in the military defense and agriculture industries.
BS434 V-90 N/A
185733 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 5.600 in142.24 mm N/A 0.006 in0.15 mm N/A -434 N/A N/A O-rings are used in the military defense and agriculture industries.
BS433 V-90 N/A
185734 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 5.475 in139.07 mm N/A 0.006 in0.15 mm N/A -433 N/A N/A O-rings are used in the military defense and agriculture industries.
BS432 V-90 N/A
185735 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 5.350 in135.89 mm N/A 0.006 in0.15 mm N/A -432 N/A N/A O-rings are used in the military defense and agriculture industries.
BS431 V-90 N/A
185736 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 5.225 in132.72 mm N/A 0.006 in0.15 mm N/A -431 N/A N/A O-rings are used in the military defense and agriculture industries.
BS430 V-90 N/A
185737 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 5.100 in129.54 mm N/A 0.006 in0.15 mm N/A -430 N/A N/A O-rings are used in the military defense and agriculture industries.
BS429 V-90 N/A
185738 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 4.975 in126.37 mm N/A 0.006 in0.15 mm N/A -429 N/A N/A O-rings are used in the military defense and agriculture industries.
BS428 V-90 N/A
185739 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 4.850 in123.19 mm N/A 0.006 in0.15 mm N/A -428 N/A N/A O-rings are used in the military defense and agriculture industries.
BS427 V-90 N/A
185740 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 4.725 in120.02 mm N/A 0.006 in0.15 mm N/A -427 N/A N/A O-rings are used in the military defense and agriculture industries.
BS426 V-90 N/A
185741 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 4.600 in116.84 mm N/A 0.006 in0.15 mm N/A -426 N/A N/A O-rings are used in the military defense and agriculture industries.
BS425 V-90 N/A
185742 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 4.475 in113.67 mm N/A 0.006 in0.15 mm N/A -425 N/A N/A O-rings are used in the military defense and agriculture industries.v
BS395 V-90 N/A
185743 		N/A BS Standard O-Ring N/A Viton N/A 0.210 in5.33 mm N/A 90 N/A 25.940 in658.88 mm N/A 0.005 in0.13 mm N/A -395 N/A N/A O-rings are used in the military defense and agriculture industries.
Unit of Measure
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